Your post is really interesting for me because I went through 5 months of chemo for Hodgkins almost 2 years ago. Much different chemo regimens (you were probably on CHOP or r-CHOP, I was on ABVD).
In my case, I was told that my chemo drugs won't affect my fertility. I am, though, scared to conceive (despite being given the green light by both my Oncologist, and 2 other leading lymphoma experts) because my diagnosis came immediately after having my second child.
I don't think the Chemo drugs will be an issue. They should be well out of your system.
I would recommend having the conversation with both of the physicians you mention as well as a leading Lymphoma expert at MD Anderson in Houston (one of the best cancer centers world wide).
His name is Dr. Anas Younes, and he's very active online via Facebook and Twitter - you can look him up on Facebook. He has a fan page, you can like him, and he'll respond very quickly with questions that are legitimate.
His twitter name is @DrAnasYounes - I sent him a question about how long to wait after treatment to conceive, and he responded in about 20 minutes.
Good luck with your pregnancy and your follow-up. I hope your lymphoma is gone for good (mine, too).